CN114857484B - LNG storage tank, supporting structure and installation method - Google Patents

LNG storage tank, supporting structure and installation method Download PDF

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Publication number
CN114857484B
CN114857484B CN202210209051.XA CN202210209051A CN114857484B CN 114857484 B CN114857484 B CN 114857484B CN 202210209051 A CN202210209051 A CN 202210209051A CN 114857484 B CN114857484 B CN 114857484B
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China
Prior art keywords
heat insulation
tank
supporting
layer
inner tank
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CN202210209051.XA
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Chinese (zh)
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CN114857484A (en
Inventor
柳江
余坤
陈志勇
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YICHANG JIANGXIA MARINE MACHINERY CO Ltd
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YICHANG JIANGXIA MARINE MACHINERY CO Ltd
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Priority to CN202210209051.XA priority Critical patent/CN114857484B/en
Publication of CN114857484A publication Critical patent/CN114857484A/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
    • F17C1/02—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge involving reinforcing arrangements
    • F17C1/04—Protecting sheathings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
    • F17C1/02—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge involving reinforcing arrangements
    • F17C1/08—Integral reinforcements, e.g. ribs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
    • F17C1/12—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge with provision for thermal insulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/01—Reinforcing or suspension means
    • F17C2203/011—Reinforcing means
    • F17C2203/012—Reinforcing means on or in the wall, e.g. ribs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/03—Thermal insulations
    • F17C2203/0304—Thermal insulations by solid means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/32—Hydrogen storage

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

The application provides an LNG storage tank, a supporting structure and an installation method, wherein the LNG storage tank comprises an outer tank and an inner tank, the inner tank is positioned in the outer tank, a sealing cavity is formed between the inner tank and the outer tank, a supporting heat insulation structure is arranged between the inner tank and the outer tank, the supporting heat insulation structure comprises an end positioning ring, the end positioning ring is positioned at the inner side of the outer tank and close to the end of the inner tank, and the end positioning ring is used for limiting the axial position of the inner tank in the outer tank; a plurality of stiffening rings are fixedly arranged on the inner wall of the outer tank along the circumference, the stiffening rings are arranged along the axis, and the inner side of the stiffening ring is fixedly provided with a heat insulation supporting ring; the inner wall of the inner tank is provided with a heat insulation layer, and the heat insulation supporting ring is contacted with the heat insulation layer; and heat insulating materials are filled in other positions of the sealing cavity. By using a combined support structure of stiffening rings and insulating support rings, a balance can be achieved between the support effect and the insulating effect. The support column that sets up can provide higher supporting effect, and can compensate the deformation of inner tank.

Description

LNG storage tank, supporting structure and installation method
Technical Field
The application relates to the field of low-temperature pressure tank preparation, in particular to an LNG storage tank, a supporting structure and an installation method.
Background
The LNG storage tank is used for storing low-temperature LNG gas, the working temperature is-162 ℃, the pressure resistance reaches 1Mpa, a double-layer tank body structure is adopted, and a supporting structure is required to be arranged between the inner tank and the outer tank in order to avoid relative shaking between the inner tank and the outer tank. However, as the temperature increases, the LNG vaporization increases the pressure in the LNG storage tank, and the thermal insulation requirement of the storage tank also requires that the pressure in the LNG storage tank does not cause the safety valve to actuate for a period of time, e.g., 15 days. Simultaneously, the requirements of a supporting structure and the requirements of heat insulation are met, so that the processing difficulty of the LNG storage tank is very high. Chinese patent document CN 207421773U describes a foam insulation and mounting structure of a single-layer shell low-temperature pressure vessel, which is not suitable for use in mobile applications such as ships because of insufficient outer structural strength. CN 103162085A describes a self-supporting LNG storage tank, which adopts a concrete outer tank structure, and is also unfavorable for movement. CN 111256034A describes an LNG tank container having high heat insulation, and a plurality of diagonal bracing structures are provided in the tank 2 of the container for supporting. However, the diagonal bracing structure affects the insulation effect. CN 211649806U describes a high-strength supporting block inside the LNG tank body, and adopts a glass fiber reinforced plastic and aerogel combined heat insulation structure, but the structure does not have the function of compensating the shrinkage of the inner tank when the inner tank is cooled. And the supporting structure also lacks the effect that the inner tank and the outer tank are mutually limited.
Disclosure of Invention
The application aims to solve the technical problem of providing an LNG storage tank, a supporting structure and an installation method, which can ensure the supporting effect and have a higher heat insulation effect. In the preferred solution, the support structure is also able to compensate for deformations of the inner tank, improving safety.
In order to solve the technical problems, the application adopts the following technical scheme: the LNG storage tank comprises an outer tank and an inner tank, wherein the inner tank is positioned in the outer tank, a sealing cavity is formed between the inner tank and the outer tank, a supporting heat insulation structure is arranged between the inner tank and the outer tank, the supporting heat insulation structure comprises an end positioning ring, the end positioning ring is positioned on the inner side of the outer tank and close to the end of the inner tank, and the end positioning ring is used for limiting the axial position of the inner tank in the outer tank;
a plurality of stiffening rings are fixedly arranged on the inner wall of the outer tank along the circumference, the stiffening rings are arranged along the axis, and the inner side of the stiffening ring is fixedly provided with a heat insulation supporting ring;
the outer wall of the inner tank is provided with a heat insulation layer, and the heat insulation supporting ring is contacted with the heat insulation layer;
and heat insulating materials are filled in other positions of the sealing cavity.
In the preferred scheme, the heat insulation layer is divided into at least two layers, the inner layer is a glass fiber heat insulation layer, and the outer layer is an aluminized film layer;
the heat insulation supporting ring is made of rigid foam plastic and/or nano aerogel felt;
the heat insulating material is perlite or nano aerogel felt.
In the preferred scheme, the stiffening ring adopts L-shaped steel, one side of the L-shaped steel is positioned at the inner side, and the stiffening ring is fixedly connected with the heat insulation supporting ring through a side structure;
the heat insulation supporting ring is divided into a plurality of layers of structures along the radial direction, wherein a rigid foam plastic layer is arranged close to the L-shaped steel, and a nano aerogel felt layer is arranged far away from the L-shaped steel;
the nanometer aerogel felt layer is connected with the hard foam plastic layer through plastic nails with barbs.
In the preferred scheme, a plurality of support columns are further arranged between the inner tank and the outer tank, and comprise a plurality of lower support columns positioned at the bottom of the inner tank and a plurality of upper support columns positioned at the top of the inner tank.
In a preferred scheme, the structure of the lower support column is as follows: one end of the heat insulation column body is fixedly connected with the outer tank, and the other end of the heat insulation column body is provided with a sliding base plate which is contacted with the heat insulation layer.
In the preferred scheme, the structure of the upper support column is as follows: the outer tank corresponding to the upper support column is provided with a mounting opening, the mounting opening is fixedly provided with a reinforcing plate for blocking, the reinforcing plate is connected with the upper cover plate, the inner side of the upper cover plate is connected with one end of the heat insulation column, and the other end of the heat insulation column is connected with the sliding backing plate or the fixed backing plate;
the fixed base plate is provided with a limiting step for limiting the displacement of the heat insulation column body, and is fixedly connected with the heat insulation layer;
the upper support columns near the middle or one end of the inner tank are connected with the fixed base plate, and the upper support columns at the other positions are connected with the sliding base plate;
the heat insulation column body is filled with a filling body, and the filling body adopts a heat insulation material with a vacuum expansion effect.
In a preferred scheme, the heat-insulating column body comprises a heat-insulating inner pipe and a heat-insulating outer pipe which are in sliding sleeve joint with each other, a heat-insulating cushion layer is arranged between the heat-insulating inner pipe and the heat-insulating outer pipe, and the cross section of the heat-insulating cushion layer is in a Z shape so as to isolate the end faces and the side walls of the heat-insulating inner pipe and the heat-insulating outer pipe from each other.
A supporting structure for LNG storage tank, a plurality of stiffening rings along circumference are fixedly arranged on the inner wall of the outer tank, the stiffening rings are arranged along the axis, and a heat insulation supporting ring is fixedly arranged on the inner side of the stiffening ring;
the inner wall of the inner tank is provided with a heat insulation layer, and the heat insulation supporting ring is contacted with the heat insulation layer;
a plurality of support columns are arranged between the inner tank and the outer tank, and comprise a plurality of lower support columns positioned at the bottom of the inner tank and a plurality of upper support columns positioned at the top of the inner tank;
the structure of the upper support column is as follows: the outer tank corresponding to the upper support column is provided with a mounting opening, the mounting opening is fixedly provided with a reinforcing plate for blocking, the reinforcing plate is connected with the upper cover plate, the inner side of the upper cover plate is connected with one end of the heat insulation column, and the other end of the heat insulation column is connected with the sliding backing plate or the fixed backing plate;
the fixed base plate is provided with a limiting step for limiting the displacement of the heat insulation column body, and is fixedly connected with the heat insulation layer;
the upper support columns near the middle or one end of the inner tank are connected with the fixed base plate, and the upper support columns at the other positions are connected with the sliding base plate;
the heat insulation column body is filled with a filling body, and the filling body adopts a heat insulation material with a vacuum expansion effect.
An installation method for the LNG storage tank comprises the following steps:
s1, coating a heat insulation layer on the inner wall of an unsealed inner tank;
s2, enabling the opening of the unsealed inner tank to face downwards, and reliably supporting the unsealed inner tank by a supporting frame;
s3, arranging an end positioning ring on the inner wall of the unsealed outer tank;
s4, arranging stiffening rings and heat insulation supporting rings on the inner wall of the unsealed outer tank, and filling heat insulation materials among the stiffening rings;
s5, arranging a lower support column on the inner wall of the unsealed outer tank;
s6, hoisting the unsealed outer tank and sleeving the unsealed inner tank;
s7, integrally laying down the unsealed outer tank, the unsealed inner tank and the supporting frame, installing all outer connecting pipes, and installing supporting columns from the outer wall of the unsealed outer tank;
s8, taking out the support frame, installing an inner tank end cover, filling heat insulation materials, and installing an outer tank end cover;
s9, vacuumizing the sealed cavity;
through the steps, the LNG storage tank is installed.
In the preferred scheme, the support frame comprises a frame body, and a plurality of adjustable cushion blocks are arranged on the top and the side wall of the frame body;
the support and the support body fixed connection of adjustable cushion, adjustable cushion and support sliding connection, the one end of adjustable cushion is equipped with adjusting screw, adjusting screw and support threaded connection, the position of adjustable cushion is adjusted through adjusting screw.
According to the LNG storage tank, the supporting structure and the installation method, the combination supporting structure of the stiffening ring and the heat insulation supporting ring is adopted, so that the balance between the supporting effect and the heat insulation effect can be achieved. The support column that sets up can provide higher supporting effect, and can compensate the deformation of inner tank. The structure of the application is also convenient for installation.
Drawings
The application is further illustrated by the following examples in conjunction with the accompanying drawings:
fig. 1 is a schematic front view of the present application.
Fig. 2 is a schematic view in cross-section, partially in section, of the present application.
Fig. 3 is a schematic view of a partially enlarged structure of the heat insulating support ring of the present application.
Fig. 4 is a schematic structural view of a sliding upper support column according to the present application.
Fig. 5 is a schematic structural view of the fixed upper support column of the present application.
Fig. 6 is a schematic view showing a preferred structure of the heat insulating cylinder in the present application.
Fig. 7 is a schematic view of the structure of the present application when installed.
Fig. 8 is a schematic structural diagram of an adjustable spacer according to the present application.
In the figure: the heat-insulating material comprises an outer tank 1, an inner tank 2, a head positioning ring 3, a stiffening ring 4, a heat-insulating support ring 5, a sealing cavity 6, a heat-insulating layer 7, a lower support column 8, an upper support column 9, a reinforcing plate 91, an upper cover plate 92, a heat-insulating column 93, a heat-insulating inner tube 931, a heat-insulating cushion 932, a heat-insulating outer tube 933, a filling body 94, a sliding cushion 95, a fixed cushion 96, a limiting step 97, a limiting block 10, an unsealed outer tank 100, an unsealed inner tank 200, a supporting frame 300 and an adjustable cushion 400.
Detailed Description
Example 1:
as shown in fig. 1-3, an LNG storage tank includes an outer tank 1 and an inner tank 2, the inner tank 2 is located in the outer tank 1, a sealing cavity 6 is formed between the inner tank 2 and the outer tank 1, a supporting and heat insulating structure is arranged between the inner tank 2 and the outer tank 1, the supporting and heat insulating structure includes an end positioning ring 3, the end positioning ring 3 is preferably made of rigid foam plastic, such as foamed polyurethane, the thermal conductivity is 0.03W/m·k, the end positioning ring 3 is located inside the outer tank 1 and near the end of the inner tank 2, and the end positioning ring 3 is used for limiting the axial position of the inner tank 2 in the outer tank 1;
a plurality of stiffening rings 4 along the circumference are fixedly arranged on the inner wall of the outer tank 1, the stiffening rings 4 are arranged along the axis, and an adiabatic support ring 5 is fixedly arranged on the inner side of the stiffening ring 4;
the outer wall of the inner tank 2 is provided with a heat insulation layer 7, and the heat insulation supporting ring 5 is contacted with the heat insulation layer 7;
in the preferred scheme, as shown in fig. 3, the stiffening ring 4 adopts an L-shaped steel, one side of the L-shaped steel is positioned at the inner side, and the stiffening ring 4 is fixedly connected with the heat insulation supporting ring 5 through a side structure;
preferably, as shown in fig. 3, the heat insulation supporting ring 5 is made of rigid foam plastic and/or nano aerogel felt;
in another alternative structure, the heat-insulating supporting ring 5 is divided into a plurality of layers along the radial direction, and the layer close to the L-shaped steel is a rigid foam plastic layer, such as foaming, and the layer far away from the L-shaped steel is a nano aerogel felt layer;
the nanometer aerogel felt layer is connected with the hard foam plastic layer through plastic nails with barbs.
The other positions of the sealing cavity 6 are filled with heat insulating materials. For example, perlite or nano aerogel blanket is filled between the stiffening ring 4 and the insulating support ring 5 as an insulating material.
In the preferred scheme, the heat insulation layer 7 is divided into at least two layers, wherein the inner layer is a glass fiber heat insulation layer, and the outer layer is an aluminized film layer; it is also possible that the aluminized film layer is a silver-plated film layer, the aluminized film layer is used for reflecting heat radiation, and the glass fiber heat insulation layer is mainly used for blocking heat conduction.
In a preferred embodiment, as shown in fig. 2, 4 and 5, a plurality of support columns are further arranged between the inner tank 2 and the outer tank 1, including a plurality of lower support columns 8 positioned at the bottom of the inner tank 2 and a plurality of upper support columns 9 positioned at the top of the inner tank 2.
In a preferred embodiment, as shown in fig. 2, the lower support column 8 has the following structure: one end of the heat insulation column 93 is fixedly connected with the outer tank 1, and a sliding base plate 95 is arranged at the other end of the heat insulation column 93, and the sliding base plate 95 is in sliding contact with the heat insulation layer 7. The lower support column 8 is directly fixed and built in the inner wall of the outer tank 1. The sliding pad 95 is preferably made of glass fiber.
In a preferred embodiment, as shown in fig. 4 and 5, the upper support column 9 has the following structure: the outer tank 1 corresponding to the upper support column 9 is provided with a mounting opening, the mounting opening is fixedly provided with a reinforcing plate 91 for blocking, the reinforcing plate 91 is connected with an upper cover plate 92, the inner side of the upper cover plate 92 is connected with one end of a heat insulation column 93, and the other end of the heat insulation column 93 is connected with a sliding base plate 95 or a fixed base plate 96; the upper support column 9 is mounted from the outer wall of the outer tank 1 at the time of mounting.
The fixed base plate 96 is provided with a limiting step 97 for limiting the displacement of the heat insulation column 93, and the fixed base plate 96 is fixedly connected with the heat insulation layer 7; the upper support column 9 near the middle or one end of the inner tank 2 is connected with a fixed base plate 96, and the upper support columns 9 at the rest positions are connected with a sliding base plate 95; with this structure, the upper support column 9 is facilitated to adapt to the deformation of the inner tank 2.
The heat insulating column 93 is filled with a filler 94, and the filler 94 is made of a heat insulating material having a vacuum expansion effect. Such as perlite or rigid foam, when a vacuum is drawn in the sealed chamber 6, the air within the perlite expands, expanding the perlite or rigid foam.
Preferably, as shown in fig. 6, the heat insulating column 93 comprises an inner heat insulating tube 931 and an outer heat insulating tube 933 slidably coupled to each other, a heat insulating cushion layer 932 provided between the inner heat insulating tube 931 and the outer heat insulating tube 933, and the heat insulating cushion layer 932 having a cross section in a "z" shape to isolate end faces and side walls of the inner heat insulating tube 931 and the outer heat insulating tube 933 from each other. With this configuration, the deformation of the inner tank 2 is compensated for by sliding the heat insulating inner pipe 931 and the heat insulating outer pipe 933 with each other while ensuring the heat insulating effect. Preferably, the heat insulating inner pipe 931 and the heat insulating outer pipe 933 are made of glass fiber materials. The insulating blanket 932 is a nano aerogel blanket. The heat insulating inner tube 931 is filled with a heat insulating material having a vacuum expansion effect.
Example 2:
as an independent supporting structure, as shown in fig. 1-6, a supporting structure for an LNG storage tank is provided, wherein a plurality of stiffening rings 4 along the circumference are fixedly arranged on the inner wall of an outer tank 1, the plurality of stiffening rings 4 are arranged along the axis, and a heat insulation supporting ring 5 is fixedly arranged on the inner side of the stiffening ring 4;
the inner wall of the inner tank 2 is provided with a heat insulation layer 7, and the heat insulation supporting ring 5 is contacted with the heat insulation layer 7;
a plurality of support columns are also arranged between the inner tank 2 and the outer tank 1, and comprise a plurality of lower support columns 8 positioned at the bottom of the inner tank 2 and a plurality of upper support columns 9 positioned at the top of the inner tank 2;
the structure of the upper support column 9 is: the outer tank 1 corresponding to the upper support column 9 is provided with a mounting opening, the mounting opening is fixedly provided with a reinforcing plate 91 for blocking, the reinforcing plate 91 is connected with an upper cover plate 92, the inner side of the upper cover plate 92 is connected with one end of a heat insulation column 93, and the other end of the heat insulation column 93 is connected with a sliding base plate 95 or a fixed base plate 96;
the fixed base plate 96 is provided with a limiting step 97 for limiting the displacement of the heat insulation column 93, and the fixed base plate 96 is fixedly connected with the heat insulation layer 7;
the upper support column 9 near the middle or one end of the inner tank 2 is connected with a fixed base plate 96, and the upper support columns 9 at the rest positions are connected with a sliding base plate 95;
the heat insulating column 93 is filled with a filler 94, and the filler 94 is made of a heat insulating material having a vacuum expansion effect.
Example 3:
as shown in fig. 7, an installation method for the LNG tank described above includes the steps of:
s1, coating a heat insulation layer 7 on the inner wall of an unsealed inner tank 200; unsealed inner vessel 200 is an inner vessel in which the end cap is not attached.
S2, opening the unsealed inner tank 200 downwards, and reliably supporting the unsealed inner tank by using a supporting frame 300; in a preferred embodiment, as shown in fig. 7, the supporting frame 300 comprises a frame body, wherein the frame body is a single column or a ring column, the stress is ensured to be reliable, and a plurality of adjustable cushion blocks 400 are arranged at the top and the side wall of the frame body; the adjustable spacer 400 contacts the inner wall of the unsealed inner vessel 200 and provides precise spacing and support.
The support and the support body fixed connection of adjustable cushion 400, adjustable cushion 400 and support sliding connection, the one end of adjustable cushion 400 is equipped with adjusting screw, adjusting screw and support threaded connection, the position of adjustable cushion 400 is adjusted through adjusting screw. The shape and position accuracy of the unsealed inner can 200 is made to meet the preset requirements by the adjustment of the adjustable spacer 400.
S3, arranging an end positioning ring 3 on the inner wall of the unsealed outer tank 100;
s4, arranging a plurality of stiffening rings 4 and heat insulation supporting rings 5 on the inner wall of the unsealed outer tank 100 in a welding mode from top to bottom, wherein the single stiffening rings 4 are horizontally arranged. Filling the respective stiffening rings 4 with a heat insulating material, such as a nano aerogel felt layer; the rigid foam plastic layer in the heat insulation supporting ring 5 is connected with the stiffening ring 4 through an adhesive, the nano aerogel felt layer is connected with the rigid foam plastic layer through a plurality of plastic nails with barbs, and the barbs of the plastic nails are positioned in the rigid foam plastic layer, so that the structure greatly reduces the installation difficulty. After the installation of the insulating support rings 5 is completed, a nano aerogel felt layer is also arranged between the insulating support rings 5. After completion, the inner wall of the unsealed outer can 100 is smooth and free of protrusions.
S5, arranging a lower support column 8 on the inner wall of the unsealed outer tank 100;
s6, hoisting the unsealed outer tank 100 and sleeving the unsealed inner tank 200; during the hoisting process, it is noted that the insulating support ring 5 is not deformed.
S7, integrally laying the unsealed outer tank 100, the unsealed inner tank 200 and the supporting frame 300, installing each outer connecting pipe, and installing the supporting column 9 on the outer wall of the unsealed outer tank 100;
the method comprises the following steps: a sliding base plate 95 and a fixed base plate 96 are firstly arranged at the opening of the outer wall of the outer tank, the sliding base plate 95 and the fixed base plate 96 are connected with the heat insulation layer 7 in an adhesive mode, then the reinforcing plate 91 is welded and connected, finally the heat insulation column 93 and the upper cover plate 92 are arranged, and the upper cover plate 92 is welded and connected with the reinforcing plate 91.
S8, taking out the support frame 300, installing an inner tank end cover, connecting various pipes, filling heat insulation materials, and installing an outer tank end cover;
s9, vacuumizing the sealed cavity 6;
through the steps, the LNG storage tank is installed.
The above embodiments are merely preferred embodiments of the present application, and should not be construed as limiting the present application, and the embodiments and features of the embodiments of the present application may be arbitrarily combined with each other without collision. The protection scope of the present application is defined by the claims, and the protection scope includes equivalent alternatives to the technical features of the claims. I.e., equivalent replacement modifications within the scope of this application are also within the scope of the application.

Claims (3)

1. The utility model provides a mounting method of LNG storage tank, includes outer jar (1) and inner tank (2), and inner tank (2) are located outer jar (1), constitute sealed chamber (6) between inner tank (2) and outer jar (1), are equipped with between inner tank (2) and outer jar (1) and support heat insulation structure, characterized by: the supporting heat insulation structure comprises an end positioning ring (3), wherein the end positioning ring (3) is positioned at the inner side of the outer tank (1) and close to the end of the inner tank (2), and the end positioning ring (3) is used for limiting the axial position of the inner tank (2) in the outer tank (1);
a plurality of stiffening rings (4) along the circumference are fixedly arranged on the inner wall of the outer tank (1), the stiffening rings (4) are arranged along the axis, and an adiabatic support ring (5) is fixedly arranged on the inner side of the stiffening ring (4);
the outer wall of the inner tank (2) is provided with a heat insulation layer (7), and the heat insulation supporting ring (5) is contacted with the heat insulation layer (7);
the other positions of the sealing cavity (6) are filled with heat insulation materials;
the stiffening ring (4) adopts L-shaped steel, one side of the L-shaped steel is positioned at the inner side, and the stiffening ring (4) is fixedly connected with the heat insulation supporting ring (5) through the structure of the side;
the heat insulation supporting ring (5) is divided into a plurality of layers of structures along the radial direction, wherein a rigid foam plastic layer is arranged close to the L-shaped steel, and a nano aerogel felt layer is arranged far away from the L-shaped steel;
the nanometer aerogel felt layer is connected with the hard foam plastic layer through plastic nails with barbs;
a plurality of support columns are also arranged between the inner tank (2) and the outer tank (1), and comprise a plurality of lower support columns (8) positioned at the bottom of the inner tank (2) and a plurality of upper support columns (9) positioned at the top of the inner tank (2);
the structure of the lower support column (8) is as follows: one end of the heat insulation column body (93) is fixedly connected with the outer tank (1), a sliding base plate (95) is arranged at the other end of the heat insulation column body (93), and the sliding base plate (95) is contacted with the heat insulation layer (7);
the structure of the upper support column (9) is as follows: the outer tank (1) corresponding to the upper support column (9) is provided with a mounting opening, the mounting opening is fixedly provided with a reinforcing plate (91) for blocking, the reinforcing plate (91) is connected with an upper cover plate (92), the inner side of the upper cover plate (92) is connected with one end of a heat insulation column (93), and the other end of the heat insulation column (93) is connected with a sliding base plate (95) or a fixed base plate (96);
wherein, the fixed base plate (96) is provided with a limiting stage (97) for limiting the displacement of the heat insulation column body (93), and the fixed base plate (96) is fixedly connected with the heat insulation layer (7);
the upper support column (9) near the middle or one end of the inner tank (2) is connected with the fixed base plate (96), and the upper support columns (9) at the other positions are connected with the sliding base plate (95);
the heat insulation column body (93) is filled with a filling body (94), and the filling body (94) adopts a heat insulation material with a vacuum expansion effect;
the heat insulation column body (93) comprises a heat insulation inner pipe (931) and a heat insulation outer pipe (933) which are in sliding sleeve joint with each other, a heat insulation cushion layer (932) is arranged between the heat insulation inner pipe (931) and the heat insulation outer pipe (933), and the cross section of the heat insulation cushion layer (932) is in a Z shape so as to isolate the end surfaces and the side walls of the heat insulation inner pipe (931) and the heat insulation outer pipe (933) from each other;
the installation method comprises the following steps:
s1, coating a heat insulation layer (7) on the inner wall of an unsealed inner tank (200);
s2, opening the unsealed inner tank (200) downwards, and reliably supporting the unsealed inner tank by a supporting frame (300);
s3, arranging an end positioning ring (3) on the inner wall of the unsealed outer tank (100);
s4, arranging stiffening rings (4) and heat insulation supporting rings (5) on the inner wall of the unsealed outer tank (100), and filling heat insulation materials between the stiffening rings (4);
s5, arranging a lower support column (8) on the inner wall of the unsealed outer tank (100);
s6, hoisting the unsealed outer tank (100) and sleeving the unsealed inner tank (200);
s7, integrally laying the unsealed outer tank (100), the unsealed inner tank (200) and the supporting frame (300), installing each outer connecting pipe, and installing the supporting column (9) from the outer wall of the unsealed outer tank (100);
s8, taking out the supporting frame (300), installing an inner tank end cover, filling heat insulation materials, and installing an outer tank end cover;
s9, vacuumizing the sealing cavity (6);
through the steps, the LNG storage tank is installed.
2. The installation method of an LNG tank according to claim 1, characterized by: the heat insulation layer (7) is divided into at least two layers, the inner layer is a glass fiber heat insulation layer, and the outer layer is an aluminized film layer;
the heat insulation supporting ring (5) is made of rigid foam plastic and/or nano aerogel felt;
the heat insulating material is perlite or nano aerogel felt.
3. The installation method of an LNG tank according to claim 1, characterized by: the support frame (300) comprises a frame body, and a plurality of adjustable cushion blocks (400) are arranged on the top and the side wall of the frame body;
the support and the support body fixed connection of adjustable cushion (400), adjustable cushion (400) and support sliding connection, the one end of adjustable cushion (400) is equipped with adjusting screw, adjusting screw and support threaded connection, the position of adjustable cushion (400) is adjusted through adjusting screw.
CN202210209051.XA 2022-03-04 2022-03-04 LNG storage tank, supporting structure and installation method Active CN114857484B (en)

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CN103538820A (en) * 2013-10-23 2014-01-29 西安轨道交通装备有限责任公司 Inner tank and outer tank structural support
CN206798296U (en) * 2017-03-16 2017-12-26 陕西汽车集团有限责任公司 Vacuum thermal insulation transports storage tank and fresh milk transport vehicle
CN108194833A (en) * 2018-03-14 2018-06-22 新兴能源装备股份有限公司 A kind of support construction of vertical low temperature storage tank
CN207848956U (en) * 2018-02-24 2018-09-11 国鸿液化气机械工程（大连）有限公司 A kind of double-layer vacuum insulated storage tank peculiar to vessel with air chamber structure
CN109780416A (en) * 2017-11-15 2019-05-21 张家港中集圣达因低温装备有限公司 High-vacuum insulation Double-layer Spherical
CN214369261U (en) * 2020-12-07 2021-10-08 张家港中集圣达因低温装备有限公司 Marine fuel tank

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2797262Y (en) * 2005-06-17 2006-07-19 重庆康达机械(集团)有限责任公司 Tank container
KR20130001844A (en) * 2011-06-28 2013-01-07 현대중공업 주식회사 Support structure of storage tank has a vacuum insulation
CN103538820A (en) * 2013-10-23 2014-01-29 西安轨道交通装备有限责任公司 Inner tank and outer tank structural support
CN206798296U (en) * 2017-03-16 2017-12-26 陕西汽车集团有限责任公司 Vacuum thermal insulation transports storage tank and fresh milk transport vehicle
CN109780416A (en) * 2017-11-15 2019-05-21 张家港中集圣达因低温装备有限公司 High-vacuum insulation Double-layer Spherical
CN207848956U (en) * 2018-02-24 2018-09-11 国鸿液化气机械工程（大连）有限公司 A kind of double-layer vacuum insulated storage tank peculiar to vessel with air chamber structure
CN108194833A (en) * 2018-03-14 2018-06-22 新兴能源装备股份有限公司 A kind of support construction of vertical low temperature storage tank
CN214369261U (en) * 2020-12-07 2021-10-08 张家港中集圣达因低温装备有限公司 Marine fuel tank

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